--- /dev/null
+/*
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id: sa_query.c 1389 2004-12-27 22:56:47Z roland $
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/random.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/kref.h>
+#include <linux/idr.h>
+
+#include <ib_pack.h>
+#include <ib_sa.h>
+
+MODULE_AUTHOR("Roland Dreier");
+MODULE_DESCRIPTION("InfiniBand subnet administration query support");
+MODULE_LICENSE("Dual BSD/GPL");
+
+/*
+ * These two structures must be packed because they have 64-bit fields
+ * that are only 32-bit aligned. 64-bit architectures will lay them
+ * out wrong otherwise. (And unfortunately they are sent on the wire
+ * so we can't change the layout)
+ */
+struct ib_sa_hdr {
+ u64 sm_key;
+ u16 attr_offset;
+ u16 reserved;
+ ib_sa_comp_mask comp_mask;
+} __attribute__ ((packed));
+
+struct ib_sa_mad {
+ struct ib_mad_hdr mad_hdr;
+ struct ib_rmpp_hdr rmpp_hdr;
+ struct ib_sa_hdr sa_hdr;
+ u8 data[200];
+} __attribute__ ((packed));
+
+struct ib_sa_sm_ah {
+ struct ib_ah *ah;
+ struct kref ref;
+};
+
+struct ib_sa_port {
+ struct ib_mad_agent *agent;
+ struct ib_mr *mr;
+ struct ib_sa_sm_ah *sm_ah;
+ struct work_struct update_task;
+ spinlock_t ah_lock;
+ u8 port_num;
+};
+
+struct ib_sa_device {
+ int start_port, end_port;
+ struct ib_event_handler event_handler;
+ struct ib_sa_port port[0];
+};
+
+struct ib_sa_query {
+ void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
+ void (*release)(struct ib_sa_query *);
+ struct ib_sa_port *port;
+ struct ib_sa_mad *mad;
+ struct ib_sa_sm_ah *sm_ah;
+ DECLARE_PCI_UNMAP_ADDR(mapping)
+ int id;
+};
+
+struct ib_sa_path_query {
+ void (*callback)(int, struct ib_sa_path_rec *, void *);
+ void *context;
+ struct ib_sa_query sa_query;
+};
+
+struct ib_sa_mcmember_query {
+ void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
+ void *context;
+ struct ib_sa_query sa_query;
+};
+
+static void ib_sa_add_one(struct ib_device *device);
+static void ib_sa_remove_one(struct ib_device *device);
+
+static struct ib_client sa_client = {
+ .name = "sa",
+ .add = ib_sa_add_one,
+ .remove = ib_sa_remove_one
+};
+
+static spinlock_t idr_lock;
+static DEFINE_IDR(query_idr);
+
+static spinlock_t tid_lock;
+static u32 tid;
+
+enum {
+ IB_SA_ATTR_CLASS_PORTINFO = 0x01,
+ IB_SA_ATTR_NOTICE = 0x02,
+ IB_SA_ATTR_INFORM_INFO = 0x03,
+ IB_SA_ATTR_NODE_REC = 0x11,
+ IB_SA_ATTR_PORT_INFO_REC = 0x12,
+ IB_SA_ATTR_SL2VL_REC = 0x13,
+ IB_SA_ATTR_SWITCH_REC = 0x14,
+ IB_SA_ATTR_LINEAR_FDB_REC = 0x15,
+ IB_SA_ATTR_RANDOM_FDB_REC = 0x16,
+ IB_SA_ATTR_MCAST_FDB_REC = 0x17,
+ IB_SA_ATTR_SM_INFO_REC = 0x18,
+ IB_SA_ATTR_LINK_REC = 0x20,
+ IB_SA_ATTR_GUID_INFO_REC = 0x30,
+ IB_SA_ATTR_SERVICE_REC = 0x31,
+ IB_SA_ATTR_PARTITION_REC = 0x33,
+ IB_SA_ATTR_RANGE_REC = 0x34,
+ IB_SA_ATTR_PATH_REC = 0x35,
+ IB_SA_ATTR_VL_ARB_REC = 0x36,
+ IB_SA_ATTR_MC_GROUP_REC = 0x37,
+ IB_SA_ATTR_MC_MEMBER_REC = 0x38,
+ IB_SA_ATTR_TRACE_REC = 0x39,
+ IB_SA_ATTR_MULTI_PATH_REC = 0x3a,
+ IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b
+};
+
+#define PATH_REC_FIELD(field) \
+ .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
+ .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
+ .field_name = "sa_path_rec:" #field
+
+static const struct ib_field path_rec_table[] = {
+ { RESERVED,
+ .offset_words = 0,
+ .offset_bits = 0,
+ .size_bits = 32 },
+ { RESERVED,
+ .offset_words = 1,
+ .offset_bits = 0,
+ .size_bits = 32 },
+ { PATH_REC_FIELD(dgid),
+ .offset_words = 2,
+ .offset_bits = 0,
+ .size_bits = 128 },
+ { PATH_REC_FIELD(sgid),
+ .offset_words = 6,
+ .offset_bits = 0,
+ .size_bits = 128 },
+ { PATH_REC_FIELD(dlid),
+ .offset_words = 10,
+ .offset_bits = 0,
+ .size_bits = 16 },
+ { PATH_REC_FIELD(slid),
+ .offset_words = 10,
+ .offset_bits = 16,
+ .size_bits = 16 },
+ { PATH_REC_FIELD(raw_traffic),
+ .offset_words = 11,
+ .offset_bits = 0,
+ .size_bits = 1 },
+ { RESERVED,
+ .offset_words = 11,
+ .offset_bits = 1,
+ .size_bits = 3 },
+ { PATH_REC_FIELD(flow_label),
+ .offset_words = 11,
+ .offset_bits = 4,
+ .size_bits = 20 },
+ { PATH_REC_FIELD(hop_limit),
+ .offset_words = 11,
+ .offset_bits = 24,
+ .size_bits = 8 },
+ { PATH_REC_FIELD(traffic_class),
+ .offset_words = 12,
+ .offset_bits = 0,
+ .size_bits = 8 },
+ { PATH_REC_FIELD(reversible),
+ .offset_words = 12,
+ .offset_bits = 8,
+ .size_bits = 1 },
+ { PATH_REC_FIELD(numb_path),
+ .offset_words = 12,
+ .offset_bits = 9,
+ .size_bits = 7 },
+ { PATH_REC_FIELD(pkey),
+ .offset_words = 12,
+ .offset_bits = 16,
+ .size_bits = 16 },
+ { RESERVED,
+ .offset_words = 13,
+ .offset_bits = 0,
+ .size_bits = 12 },
+ { PATH_REC_FIELD(sl),
+ .offset_words = 13,
+ .offset_bits = 12,
+ .size_bits = 4 },
+ { PATH_REC_FIELD(mtu_selector),
+ .offset_words = 13,
+ .offset_bits = 16,
+ .size_bits = 2 },
+ { PATH_REC_FIELD(mtu),
+ .offset_words = 13,
+ .offset_bits = 18,
+ .size_bits = 6 },
+ { PATH_REC_FIELD(rate_selector),
+ .offset_words = 13,
+ .offset_bits = 24,
+ .size_bits = 2 },
+ { PATH_REC_FIELD(rate),
+ .offset_words = 13,
+ .offset_bits = 26,
+ .size_bits = 6 },
+ { PATH_REC_FIELD(packet_life_time_selector),
+ .offset_words = 14,
+ .offset_bits = 0,
+ .size_bits = 2 },
+ { PATH_REC_FIELD(packet_life_time),
+ .offset_words = 14,
+ .offset_bits = 2,
+ .size_bits = 6 },
+ { PATH_REC_FIELD(preference),
+ .offset_words = 14,
+ .offset_bits = 8,
+ .size_bits = 8 },
+ { RESERVED,
+ .offset_words = 14,
+ .offset_bits = 16,
+ .size_bits = 48 },
+};
+
+#define MCMEMBER_REC_FIELD(field) \
+ .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
+ .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
+ .field_name = "sa_mcmember_rec:" #field
+
+static const struct ib_field mcmember_rec_table[] = {
+ { MCMEMBER_REC_FIELD(mgid),
+ .offset_words = 0,
+ .offset_bits = 0,
+ .size_bits = 128 },
+ { MCMEMBER_REC_FIELD(port_gid),
+ .offset_words = 4,
+ .offset_bits = 0,
+ .size_bits = 128 },
+ { MCMEMBER_REC_FIELD(qkey),
+ .offset_words = 8,
+ .offset_bits = 0,
+ .size_bits = 32 },
+ { MCMEMBER_REC_FIELD(mlid),
+ .offset_words = 9,
+ .offset_bits = 0,
+ .size_bits = 16 },
+ { MCMEMBER_REC_FIELD(mtu_selector),
+ .offset_words = 9,
+ .offset_bits = 16,
+ .size_bits = 2 },
+ { MCMEMBER_REC_FIELD(mtu),
+ .offset_words = 9,
+ .offset_bits = 18,
+ .size_bits = 6 },
+ { MCMEMBER_REC_FIELD(traffic_class),
+ .offset_words = 9,
+ .offset_bits = 24,
+ .size_bits = 8 },
+ { MCMEMBER_REC_FIELD(pkey),
+ .offset_words = 10,
+ .offset_bits = 0,
+ .size_bits = 16 },
+ { MCMEMBER_REC_FIELD(rate_selector),
+ .offset_words = 10,
+ .offset_bits = 16,
+ .size_bits = 2 },
+ { MCMEMBER_REC_FIELD(rate),
+ .offset_words = 10,
+ .offset_bits = 18,
+ .size_bits = 6 },
+ { MCMEMBER_REC_FIELD(packet_life_time_selector),
+ .offset_words = 10,
+ .offset_bits = 24,
+ .size_bits = 2 },
+ { MCMEMBER_REC_FIELD(packet_life_time),
+ .offset_words = 10,
+ .offset_bits = 26,
+ .size_bits = 6 },
+ { MCMEMBER_REC_FIELD(sl),
+ .offset_words = 11,
+ .offset_bits = 0,
+ .size_bits = 4 },
+ { MCMEMBER_REC_FIELD(flow_label),
+ .offset_words = 11,
+ .offset_bits = 4,
+ .size_bits = 20 },
+ { MCMEMBER_REC_FIELD(hop_limit),
+ .offset_words = 11,
+ .offset_bits = 24,
+ .size_bits = 8 },
+ { MCMEMBER_REC_FIELD(scope),
+ .offset_words = 12,
+ .offset_bits = 0,
+ .size_bits = 4 },
+ { MCMEMBER_REC_FIELD(join_state),
+ .offset_words = 12,
+ .offset_bits = 4,
+ .size_bits = 4 },
+ { MCMEMBER_REC_FIELD(proxy_join),
+ .offset_words = 12,
+ .offset_bits = 8,
+ .size_bits = 1 },
+ { RESERVED,
+ .offset_words = 12,
+ .offset_bits = 9,
+ .size_bits = 23 },
+};
+
+static void free_sm_ah(struct kref *kref)
+{
+ struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
+
+ ib_destroy_ah(sm_ah->ah);
+ kfree(sm_ah);
+}
+
+static void update_sm_ah(void *port_ptr)
+{
+ struct ib_sa_port *port = port_ptr;
+ struct ib_sa_sm_ah *new_ah, *old_ah;
+ struct ib_port_attr port_attr;
+ struct ib_ah_attr ah_attr;
+
+ if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
+ printk(KERN_WARNING "Couldn't query port\n");
+ return;
+ }
+
+ new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
+ if (!new_ah) {
+ printk(KERN_WARNING "Couldn't allocate new SM AH\n");
+ return;
+ }
+
+ kref_init(&new_ah->ref);
+
+ memset(&ah_attr, 0, sizeof ah_attr);
+ ah_attr.dlid = port_attr.sm_lid;
+ ah_attr.sl = port_attr.sm_sl;
+ ah_attr.port_num = port->port_num;
+
+ new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
+ if (IS_ERR(new_ah->ah)) {
+ printk(KERN_WARNING "Couldn't create new SM AH\n");
+ kfree(new_ah);
+ return;
+ }
+
+ spin_lock_irq(&port->ah_lock);
+ old_ah = port->sm_ah;
+ port->sm_ah = new_ah;
+ spin_unlock_irq(&port->ah_lock);
+
+ if (old_ah)
+ kref_put(&old_ah->ref, free_sm_ah);
+}
+
+static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
+{
+ if (event->event == IB_EVENT_PORT_ERR ||
+ event->event == IB_EVENT_PORT_ACTIVE ||
+ event->event == IB_EVENT_LID_CHANGE ||
+ event->event == IB_EVENT_PKEY_CHANGE ||
+ event->event == IB_EVENT_SM_CHANGE) {
+ struct ib_sa_device *sa_dev =
+ ib_get_client_data(event->device, &sa_client);
+
+ schedule_work(&sa_dev->port[event->element.port_num -
+ sa_dev->start_port].update_task);
+ }
+}
+
+/**
+ * ib_sa_cancel_query - try to cancel an SA query
+ * @id:ID of query to cancel
+ * @query:query pointer to cancel
+ *
+ * Try to cancel an SA query. If the id and query don't match up or
+ * the query has already completed, nothing is done. Otherwise the
+ * query is canceled and will complete with a status of -EINTR.
+ */
+void ib_sa_cancel_query(int id, struct ib_sa_query *query)
+{
+ unsigned long flags;
+ struct ib_mad_agent *agent;
+
+ spin_lock_irqsave(&idr_lock, flags);
+ if (idr_find(&query_idr, id) != query) {
+ spin_unlock_irqrestore(&idr_lock, flags);
+ return;
+ }
+ agent = query->port->agent;
+ spin_unlock_irqrestore(&idr_lock, flags);
+
+ ib_cancel_mad(agent, id);
+}
+EXPORT_SYMBOL(ib_sa_cancel_query);
+
+static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
+{
+ unsigned long flags;
+
+ memset(mad, 0, sizeof *mad);
+
+ mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
+ mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
+ mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
+
+ spin_lock_irqsave(&tid_lock, flags);
+ mad->mad_hdr.tid =
+ cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
+ spin_unlock_irqrestore(&tid_lock, flags);
+}
+
+static int send_mad(struct ib_sa_query *query, int timeout_ms)
+{
+ struct ib_sa_port *port = query->port;
+ unsigned long flags;
+ int ret;
+ struct ib_sge gather_list;
+ struct ib_send_wr *bad_wr, wr = {
+ .opcode = IB_WR_SEND,
+ .sg_list = &gather_list,
+ .num_sge = 1,
+ .send_flags = IB_SEND_SIGNALED,
+ .wr = {
+ .ud = {
+ .mad_hdr = &query->mad->mad_hdr,
+ .remote_qpn = 1,
+ .remote_qkey = IB_QP1_QKEY,
+ .timeout_ms = timeout_ms
+ }
+ }
+ };
+
+retry:
+ if (!idr_pre_get(&query_idr, GFP_ATOMIC))
+ return -ENOMEM;
+ spin_lock_irqsave(&idr_lock, flags);
+ ret = idr_get_new(&query_idr, query, &query->id);
+ spin_unlock_irqrestore(&idr_lock, flags);
+ if (ret == -EAGAIN)
+ goto retry;
+ if (ret)
+ return ret;
+
+ wr.wr_id = query->id;
+
+ spin_lock_irqsave(&port->ah_lock, flags);
+ kref_get(&port->sm_ah->ref);
+ query->sm_ah = port->sm_ah;
+ wr.wr.ud.ah = port->sm_ah->ah;
+ spin_unlock_irqrestore(&port->ah_lock, flags);
+
+ gather_list.addr = dma_map_single(port->agent->device->dma_device,
+ query->mad,
+ sizeof (struct ib_sa_mad),
+ DMA_TO_DEVICE);
+ gather_list.length = sizeof (struct ib_sa_mad);
+ gather_list.lkey = port->mr->lkey;
+ pci_unmap_addr_set(query, mapping, gather_list.addr);
+
+ ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
+ if (ret) {
+ dma_unmap_single(port->agent->device->dma_device,
+ pci_unmap_addr(query, mapping),
+ sizeof (struct ib_sa_mad),
+ DMA_TO_DEVICE);
+ kref_put(&query->sm_ah->ref, free_sm_ah);
+ spin_lock_irqsave(&idr_lock, flags);
+ idr_remove(&query_idr, query->id);
+ spin_unlock_irqrestore(&idr_lock, flags);
+ }
+
+ return ret;
+}
+
+static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
+ int status,
+ struct ib_sa_mad *mad)
+{
+ struct ib_sa_path_query *query =
+ container_of(sa_query, struct ib_sa_path_query, sa_query);
+
+ if (mad) {
+ struct ib_sa_path_rec rec;
+
+ ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
+ mad->data, &rec);
+ query->callback(status, &rec, query->context);
+ } else
+ query->callback(status, NULL, query->context);
+}
+
+static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
+{
+ kfree(sa_query->mad);
+ kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
+}
+
+/**
+ * ib_sa_path_rec_get - Start a Path get query
+ * @device:device to send query on
+ * @port_num: port number to send query on
+ * @rec:Path Record to send in query
+ * @comp_mask:component mask to send in query
+ * @timeout_ms:time to wait for response
+ * @gfp_mask:GFP mask to use for internal allocations
+ * @callback:function called when query completes, times out or is
+ * canceled
+ * @context:opaque user context passed to callback
+ * @sa_query:query context, used to cancel query
+ *
+ * Send a Path Record Get query to the SA to look up a path. The
+ * callback function will be called when the query completes (or
+ * fails); status is 0 for a successful response, -EINTR if the query
+ * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
+ * occurred sending the query. The resp parameter of the callback is
+ * only valid if status is 0.
+ *
+ * If the return value of ib_sa_path_rec_get() is negative, it is an
+ * error code. Otherwise it is a query ID that can be used to cancel
+ * the query.
+ */
+int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
+ struct ib_sa_path_rec *rec,
+ ib_sa_comp_mask comp_mask,
+ int timeout_ms, int gfp_mask,
+ void (*callback)(int status,
+ struct ib_sa_path_rec *resp,
+ void *context),
+ void *context,
+ struct ib_sa_query **sa_query)
+{
+ struct ib_sa_path_query *query;
+ struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
+ struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
+ struct ib_mad_agent *agent = port->agent;
+ int ret;
+
+ query = kmalloc(sizeof *query, gfp_mask);
+ if (!query)
+ return -ENOMEM;
+ query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
+ if (!query->sa_query.mad) {
+ kfree(query);
+ return -ENOMEM;
+ }
+
+ query->callback = callback;
+ query->context = context;
+
+ init_mad(query->sa_query.mad, agent);
+
+ query->sa_query.callback = ib_sa_path_rec_callback;
+ query->sa_query.release = ib_sa_path_rec_release;
+ query->sa_query.port = port;
+ query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET;
+ query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
+ query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
+
+ ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
+ rec, query->sa_query.mad->data);
+
+ *sa_query = &query->sa_query;
+ ret = send_mad(&query->sa_query, timeout_ms);
+ if (ret) {
+ *sa_query = NULL;
+ kfree(query->sa_query.mad);
+ kfree(query);
+ }
+
+ return ret ? ret : query->sa_query.id;
+}
+EXPORT_SYMBOL(ib_sa_path_rec_get);
+
+static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
+ int status,
+ struct ib_sa_mad *mad)
+{
+ struct ib_sa_mcmember_query *query =
+ container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
+
+ if (mad) {
+ struct ib_sa_mcmember_rec rec;
+
+ ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
+ mad->data, &rec);
+ query->callback(status, &rec, query->context);
+ } else
+ query->callback(status, NULL, query->context);
+}
+
+static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
+{
+ kfree(sa_query->mad);
+ kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
+}
+
+int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
+ u8 method,
+ struct ib_sa_mcmember_rec *rec,
+ ib_sa_comp_mask comp_mask,
+ int timeout_ms, int gfp_mask,
+ void (*callback)(int status,
+ struct ib_sa_mcmember_rec *resp,
+ void *context),
+ void *context,
+ struct ib_sa_query **sa_query)
+{
+ struct ib_sa_mcmember_query *query;
+ struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
+ struct ib_sa_port *port = &sa_dev->port[port_num - sa_dev->start_port];
+ struct ib_mad_agent *agent = port->agent;
+ int ret;
+
+ query = kmalloc(sizeof *query, gfp_mask);
+ if (!query)
+ return -ENOMEM;
+ query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
+ if (!query->sa_query.mad) {
+ kfree(query);
+ return -ENOMEM;
+ }
+
+ query->callback = callback;
+ query->context = context;
+
+ init_mad(query->sa_query.mad, agent);
+
+ query->sa_query.callback = ib_sa_mcmember_rec_callback;
+ query->sa_query.release = ib_sa_mcmember_rec_release;
+ query->sa_query.port = port;
+ query->sa_query.mad->mad_hdr.method = method;
+ query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
+ query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
+
+ ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
+ rec, query->sa_query.mad->data);
+
+ *sa_query = &query->sa_query;
+ ret = send_mad(&query->sa_query, timeout_ms);
+ if (ret) {
+ *sa_query = NULL;
+ kfree(query->sa_query.mad);
+ kfree(query);
+ }
+
+ return ret ? ret : query->sa_query.id;
+}
+EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
+
+static void send_handler(struct ib_mad_agent *agent,
+ struct ib_mad_send_wc *mad_send_wc)
+{
+ struct ib_sa_query *query;
+ unsigned long flags;
+
+ spin_lock_irqsave(&idr_lock, flags);
+ query = idr_find(&query_idr, mad_send_wc->wr_id);
+ spin_unlock_irqrestore(&idr_lock, flags);
+
+ if (!query)
+ return;
+
+ switch (mad_send_wc->status) {
+ case IB_WC_SUCCESS:
+ /* No callback -- already got recv */
+ break;
+ case IB_WC_RESP_TIMEOUT_ERR:
+ query->callback(query, -ETIMEDOUT, NULL);
+ break;
+ case IB_WC_WR_FLUSH_ERR:
+ query->callback(query, -EINTR, NULL);
+ break;
+ default:
+ query->callback(query, -EIO, NULL);
+ break;
+ }
+
+ dma_unmap_single(agent->device->dma_device,
+ pci_unmap_addr(query, mapping),
+ sizeof (struct ib_sa_mad),
+ DMA_TO_DEVICE);
+ kref_put(&query->sm_ah->ref, free_sm_ah);
+
+ query->release(query);
+
+ spin_lock_irqsave(&idr_lock, flags);
+ idr_remove(&query_idr, mad_send_wc->wr_id);
+ spin_unlock_irqrestore(&idr_lock, flags);
+}
+
+static void recv_handler(struct ib_mad_agent *mad_agent,
+ struct ib_mad_recv_wc *mad_recv_wc)
+{
+ struct ib_sa_query *query;
+ unsigned long flags;
+
+ spin_lock_irqsave(&idr_lock, flags);
+ query = idr_find(&query_idr, mad_recv_wc->wc->wr_id);
+ spin_unlock_irqrestore(&idr_lock, flags);
+
+ if (query) {
+ if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
+ query->callback(query,
+ mad_recv_wc->recv_buf.mad->mad_hdr.status ?
+ -EINVAL : 0,
+ (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
+ else
+ query->callback(query, -EIO, NULL);
+ }
+
+ ib_free_recv_mad(mad_recv_wc);
+}
+
+static void ib_sa_add_one(struct ib_device *device)
+{
+ struct ib_sa_device *sa_dev;
+ int s, e, i;
+
+ if (device->node_type == IB_NODE_SWITCH)
+ s = e = 0;
+ else {
+ s = 1;
+ e = device->phys_port_cnt;
+ }
+
+ sa_dev = kmalloc(sizeof *sa_dev +
+ (e - s + 1) * sizeof (struct ib_sa_port),
+ GFP_KERNEL);
+ if (!sa_dev)
+ return;
+
+ sa_dev->start_port = s;
+ sa_dev->end_port = e;
+
+ for (i = 0; i <= e - s; ++i) {
+ sa_dev->port[i].mr = NULL;
+ sa_dev->port[i].sm_ah = NULL;
+ sa_dev->port[i].port_num = i + s;
+ spin_lock_init(&sa_dev->port[i].ah_lock);
+
+ sa_dev->port[i].agent =
+ ib_register_mad_agent(device, i + s, IB_QPT_GSI,
+ NULL, 0, send_handler,
+ recv_handler, sa_dev);
+ if (IS_ERR(sa_dev->port[i].agent))
+ goto err;
+
+ sa_dev->port[i].mr = ib_get_dma_mr(sa_dev->port[i].agent->qp->pd,
+ IB_ACCESS_LOCAL_WRITE);
+ if (IS_ERR(sa_dev->port[i].mr)) {
+ ib_unregister_mad_agent(sa_dev->port[i].agent);
+ goto err;
+ }
+
+ INIT_WORK(&sa_dev->port[i].update_task,
+ update_sm_ah, &sa_dev->port[i]);
+ }
+
+ ib_set_client_data(device, &sa_client, sa_dev);
+
+ /*
+ * We register our event handler after everything is set up,
+ * and then update our cached info after the event handler is
+ * registered to avoid any problems if a port changes state
+ * during our initialization.
+ */
+
+ INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
+ if (ib_register_event_handler(&sa_dev->event_handler))
+ goto err;
+
+ for (i = 0; i <= e - s; ++i)
+ update_sm_ah(&sa_dev->port[i]);
+
+ return;
+
+err:
+ while (--i >= 0) {
+ ib_dereg_mr(sa_dev->port[i].mr);
+ ib_unregister_mad_agent(sa_dev->port[i].agent);
+ }
+
+ kfree(sa_dev);
+
+ return;
+}
+
+static void ib_sa_remove_one(struct ib_device *device)
+{
+ struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
+ int i;
+
+ if (!sa_dev)
+ return;
+
+ ib_unregister_event_handler(&sa_dev->event_handler);
+
+ for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
+ ib_unregister_mad_agent(sa_dev->port[i].agent);
+ kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
+ }
+
+ kfree(sa_dev);
+}
+
+static int __init ib_sa_init(void)
+{
+ int ret;
+
+ spin_lock_init(&idr_lock);
+ spin_lock_init(&tid_lock);
+
+ get_random_bytes(&tid, sizeof tid);
+
+ ret = ib_register_client(&sa_client);
+ if (ret)
+ printk(KERN_ERR "Couldn't register ib_sa client\n");
+
+ return ret;
+}
+
+static void __exit ib_sa_cleanup(void)
+{
+ ib_unregister_client(&sa_client);
+}
+
+module_init(ib_sa_init);
+module_exit(ib_sa_cleanup);
git://git.onelab.eu / linux-2.6.git / blobdiff